that was an m.i.t. police officer, sean collier, as you just said, who was shot and killed in his police cruiser. then there was reports of a carjacking in cambridge. they found their suspects in watertown. the police gave pursuit, found them in watertown and engaged in a shootout. that happened around 12:30, 1:00 a.m. friday morning. during that shootout, as you said, the suspect number one, the older brother, was shot and then later died at the hospital. the younger brother, suspect number two, the guy that they caught last night, then fled the scene. they were looking for him for almost the entire day. watertown went into a complete lockdown for about 17 hours. at 6:00 last night, the police held a press conference and said, listen, we're going to lift the lockdown. we're still looking for our guy, but you are safe to come out of your homes. people started to trickle out. they were a little wary at first because the guy was still on the loose but they started to trickle out. then around 6:50 or so last night, reporters on the ground heard shots fired.